Hi Paul,

As far as I know, the efficiency of any PE circuit is always

(Total Pout) / (Total Pin)

when both are integrated for all circuits across an entire operating cycle.

If you are trying to think of a "partial" form of the definition that applies between specific input and output, then that may be difficult to define for this type of circuit - the reason being that the losses will be "mixed up" or "inter-dependent".

Would be interested to know if you have some specific thing in mind.

Cheers !

-Sanjay

Thanks for your try.

I mean to find the overall efficiency.

Specifically " Can we just add up the individual input powers?"

ie. Pin = Pin1 + Pin2

Pin1 = Vin1 + Iin1

Pin2 = Vin2 + Iin2

or

Should I consider the ON period of Input Sources

ie

from waveform

Pin = [ d3 * Vin2 + (d3-d1) * Vin1  ] * inductor current

Paul,

That is exactly what I said. You should integrate the total input power and total output power output over a single complete operating cycle at steady state.

Now whatever THAT takes !!

I would not rule out simplifications like power summation over time segments (such as the types you are suggesting !), but I would advise caution !!

Particularly in segments where state transitions are taking place between multiple devices, you may end up with wrong results if you go for approximate summations.

Cheers !

-Sanjay

using Pin = [ d3 * Vin2 + (d3-d1) * Vin1 ] * inductor current means that the input current = the inductor current and this is wrong. So, you can simply use matlab simulink to calculate and plot the effeciency Po/Pin having  Pin=  pin 1 + pin 2 and pin 1,2 = vin1,2 * iin 1,2 and pout in same manner .